Transmission tower deformation monitoring device

Abstract

The utility model discloses a power transmission tower deformation monitoring device, which comprises a bracket, a corner reflector, a connecting piece and a mounting piece, and is characterized in that the bracket is detachably and fixedly arranged on a tower; the corner reflector comprises a bottom plate and two reflecting plates, the bottom plate is horizontally arranged and detachably and fixedly arranged on the support, and one sides of the two reflecting plates are detachably and fixedly connected to form a reflecting groove of a right-angle structure; and the connecting piece is used for detachably and fixedly arranging the end parts of the two reflecting plates on the bottom plate. The beneficial effects of the utility model are that: can solve in the prior art transmission tower deformation and inclination monitoring application, the low-medium resolution radar satellite signal reflection energy is weak, and the problem that the effective monitoring can not be realized, on the other hand, can provide the geometric calibration of the radar satellite image of centimeter level precision, and the accuracy of the transmission tower deformation and inclination monitoring is improved. And finally, mutual fusion of mm-level precision observation results of Beidou deformation monitoring and InSAR deformation monitoring can be realized.

Description

Technical Field

[0001] The utility model relates to the technical fields of corner reflectors, radar interferometry and GNSS positioning, and in particular to a deformation monitoring device for a power transmission tower. Background Art

[0002] my country's energy and load are distributed inversely, and most of the important energy corridors are located in areas prone to geological disasters. my country has vigorously carried out the construction of ultra-high voltage transmission lines and the eastward transmission of western energy, and has built a large number of ultra-high voltage transmission towers. The geological environment in the western mountainous areas is complex, landslides and mudslides are frequent, and there are safety hazards in the transmission towers. It is very necessary to monitor the slope environment of ultra-high voltage transmission channels, timely discover early landslide hazards and implement protective measures. The above-mentioned transmission channels have poor traffic conditions. At present, manual line patrols and field geological surveys are difficult to track landslide hazard points on a large scale. At the same time, traditional point monitoring devices have limited observation ranges and high operation and maintenance costs. Satellite remote sensing technology has the advantages of large monitoring range, large amount of information and high efficiency. It provides a new idea for wide-area monitoring of slope disasters caused by power transmission lines. However, it also has problems such as much interference, low accuracy and difficulty in identifying complex environments, making it difficult to meet the requirements of line operation and maintenance. By integrating multi-source satellite remote sensing technology, real-time monitoring of tower deformation and stress state analysis technology, tower slope disaster remote sensing and ground sensor monitoring technology, a new technical system can be formed to solve the problem of wide-area monitoring of slope disasters caused by power transmission lines.

[0003] The existing wide-area geological disaster monitoring technologies along the transmission lines mainly include traditional manual ground measurement technology and satellite-based SAR interferometry technology. Manual ground measurement technology mainly includes electronic levels, total stations, GPS and wireless detection systems, etc., which obtain surface deformation information through single-point or networked measurement. These manual measurement methods can obtain high spatial resolution in small areas. For the geological disaster monitoring of the entire transmission line, the coverage area is large. The length of the inter-provincial transmission line is generally hundreds of kilometers, and some are more than one thousand kilometers. The settlement survey of the entire transmission line corridor using traditional manual ground measurement methods is generally based on years. The interval between each period of data is large, and due to its high cost, the spatial density of the measurement points is also limited, which will cause the problem of missed detection of high-risk geological bodies. The use of synthetic aperture radar interferometry to monitor large-scale geological disasters along the transmission line now mainly uses satellite data sources. Compared with artificial ground measurement technology methods, the satellite-borne interferometric SAR method has a large coverage area, high spatial resolution, and is easy to implement continuous monitoring of the target area. It does not require the establishment of a special monitoring network and is relatively inexpensive. It can be used for real-time monitoring all day, all weather, and periodically. It is currently the only practical method that can obtain large-scale (hundreds of kilometers) regional surface deformation information. In theory, satellite-borne interferometric SAR can obtain millimeter-level deformation and its rate distribution in a large area along the high-speed railway, tens of kilometers wide corridor, but due to the differences in atmospheric conditions and ground changes when acquiring SAR images at different phases, the decoherence between SAR images will be caused, which to a certain extent restricts the surface deformation monitoring capability of satellite-borne interferometric SAR.

[0004] The use of satellite-borne SAR technology can accurately monitor the movement of landslides in transmission line corridors, but on the one hand, there is a problem of decoherence caused by dense vegetation in the landslide area, and on the other hand, there are problems such as weak reflection energy of the tower target radar signal and inability to monitor the effective PS points on the tower. Installing artificial corner reflectors on the towers enables them to effectively adapt to satellite-borne SAR to carry out tower displacement monitoring and be compatible with Beidou monitoring technology at the same time, and realizes the monitoring of horizontal displacement, tilt deformation, etc. of transmission towers in geological disaster areas. This is one of the key technologies for the integration of Beidou satellites and radar remote sensing satellites to monitor the displacement of transmission towers.

[0005] When the existing corner reflectors for monitoring transmission towers (such as the corner reflector for monitoring the deformation of transmission towers disclosed in application number 202122724985.0) are used in satellite-borne SAR technology to monitor the movement of landslides in transmission line corridors, there will be incoherence caused by the dense vegetation coverage in the landslide area, and there will also be weak reflection energy of the tower target radar signal, which makes it impossible to monitor the effective PS points on the tower. Therefore, there is an urgent need for a transmission tower deformation monitoring device that can effectively adapt to satellite-borne SAR to carry out tower displacement monitoring and is compatible with Beidou monitoring technology at the same time, so as to realize the monitoring of horizontal displacement, tilt deformation, etc. of transmission towers in geological disaster areas. Utility Model Content

[0006] The purpose of the utility model is to overcome the above-mentioned technical deficiencies and propose a transmission tower deformation monitoring device to solve the problems in the prior art that when the corner reflector is used in the satellite-borne SAR technology to perform displacement monitoring of the target state of the transmission line corridor tower, there is a meter-level error in the absolute positioning of the SAR satellite image, there is decoherence due to the dense vegetation coverage in the landslide area, there is weak reflection energy of the tower target radar signal, and the effective PS point on the tower cannot be monitored, and the technical problems that the GNSS deformation monitoring and InSAR monitoring results cannot be effectively integrated.

[0007] In order to achieve the above technical objectives, the technical solution of the utility model provides a transmission tower deformation monitoring device, comprising:

[0008] A bracket, used for being detachably fixed on the iron tower;

[0009] A corner reflector, comprising a bottom plate and two reflecting plates, wherein the bottom plate is horizontally arranged and detachably fixed on the bracket, and one side of the two reflecting plates is detachably fixed to form a reflecting groove of a right-angle structure;

[0010] A connecting piece, used for detachably fixing the ends of the two reflecting plates to the bottom plate, and adjusting the orientation of the reflecting groove;

[0011] The mounting piece is arranged at the junction of the two reflecting plates and is used for mounting the antenna thereon.

[0012] Furthermore, the bracket includes two support arms, the two support arms are arranged at an interval, and the two support arms each include a support rod and two clamps, the two clamps are fixed on the support rod and can be detachably fixed on the iron tower, and the base plate is detachably fixed on the two support rods.

[0013] Furthermore, the bottom plate is provided with a plurality of rows of first mounting holes, and each of the first mounting holes in each row is radially spaced outwardly with the intersection of the two reflective plates as the axis.

[0014] Furthermore, the connecting member includes two connecting plates, and the two connecting plates are respectively arranged at the bottom of the corresponding reflecting plate along the length direction of the reflecting plate, one side of the connecting plate is fixedly connected to the reflecting plate, and the other side of the connecting plate is provided with a row of second mounting holes, and each of the second mounting holes in a row is spaced apart along the length direction of the connecting plate, and a row of the second mounting holes on the connecting plate can correspond to each row of the first mounting holes in sequence, respectively, and can be detachably connected via screws.

[0015] Furthermore, the connecting plate has a first connecting surface and a second connecting surface which are fixedly connected and perpendicular to each other, the first connecting surface is fixedly connected to the side wall of the connecting plate, and a row of the second mounting holes is opened on the second connecting surface.

[0016] Furthermore, the corner reflector also includes a first fixing member, and the first fixing member is detachably connected to the side walls of the two reflecting plates.

[0017] Furthermore, the first fixing member has a first fixing surface and a second fixing surface that are fixedly connected and perpendicular to each other, the first fixing surface is detachably fixed to the side wall of one of the reflecting plates via screws, and the second fixing surface is detachably fixed to the side wall of the other reflecting plate via screws.

[0018] Furthermore, the corner reflector also includes a second fixing member, and the second fixing member is detachably connected to the tops of the two reflecting plates.

[0019] Furthermore, the second fixing member is a frame of an isosceles right triangle structure, and two sides of the frame are detachably fixed to the top of the corresponding reflecting plate via screws.

[0020] Furthermore, the mounting member is a vertically arranged mounting rod.

[0021] Compared with the prior art, the beneficial effects of the utility model include: when in use, the bracket is detachably fixed on the iron tower, and then the bottom plate is detachably fixed on the bracket, and the bottom plate is kept horizontally arranged, and then one side of the two reflecting plates is detachably fixed to form a reflecting groove with a right angle structure, and after the ends of the two reflecting plates are detachably fixed on the bottom plate by a connecting piece, the mounting piece is arranged at the intersection of the two reflecting plates, and the antenna is installed on the mounting piece, and the orientation of the reflecting groove can be adjusted by the connecting piece according to the satellite flight direction measured on the spot, so that the angular bisector of the reflecting groove and the satellite flight direction are kept as vertical as possible, and the difference is less than 20 degrees, thereby improving the reflection effect, and applying the monitoring device to the satellite-borne SAR technology to monitor the movement state of landslides in the transmission line corridor, on the one hand, it can solve the problem that the reflection energy of low- and medium-resolution radar satellite signals in the application of deformation and tilt monitoring of transmission towers in the prior art is weak, resulting in the inability to effectively monitor, and on the other hand, it can provide geometric calibration of radar satellite images with cm-level accuracy, and finally it can also realize Beidou deformation monitoring and I The mm-level precision observation results of nSAR deformation monitoring are fused with each other. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural schematic diagram of a transmission tower deformation monitoring device provided by the utility model;

[0023] Figure 2 It is a three-dimensional structural schematic diagram of a transmission tower deformation monitoring device provided by the utility model at another viewing angle;

[0024] Figure 3 It is a structural schematic diagram of a transmission tower deformation monitoring device provided by the utility model, in which the angular bisector of the reflection groove and the satellite are perpendicular to each other when they are in the first flight direction;

[0025] Figure 4 It is a structural schematic diagram of a transmission tower deformation monitoring device provided by the utility model, in which the angular bisector of the reflective groove and the satellite are perpendicular to each other when they are in the second flight direction;

[0026] Figure 5 It is a structural schematic diagram of a transmission tower deformation monitoring device provided by the utility model, in which the angular bisector of the reflection groove and the satellite are perpendicular to each other when they are in the third flight direction;

[0027] In the figure: 1-satellite flight direction, 2-radar monitoring direction, 100-bracket, 110-support arm, 111-support rod, 112-clamp, 200-corner reflector, 210-bottom plate, 211-first mounting hole, 220-reflection plate, 221-reflection groove, 230-first fixing member, 231-first fixing surface, 232-second fixing surface, 240-second fixing member, 300-connecting member, 310-connecting plate, 311-second mounting hole, 312-first connecting surface, 313-second connecting surface, 400-mounting member. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0029] The utility model provides a transmission tower deformation monitoring device, the structure of which is as follows: Figure 1 - Figure 3 As shown, it includes a bracket 100, a corner reflector 200, a connecting piece 300 and a mounting piece 400, wherein the bracket 100 is used to be detachably fixed on the iron tower; the corner reflector 200 includes a base plate 210 and two reflecting plates 220, wherein the base plate 210 is horizontally arranged and detachably fixed on the bracket 100, and one side of the two reflecting plates 220 is detachably fixed to form a reflecting groove 221 of a right-angle structure; the connecting piece 300 is used to detachably fix the ends of the two reflecting plates 220 on the base plate 210, and the direction of the reflecting groove 221 can be adjusted; the mounting piece 400 is arranged at the intersection of the two reflecting plates 220, and is used to install the antenna thereon.

[0030] When in use, the bracket 100 is detachably fixed on the iron tower, and the bottom plate 210 is detachably fixed on the bracket 100, and the bottom plate 210 is kept horizontally arranged, and one side of the two reflecting plates 220 is detachably fixed to form the reflecting groove 221 of a right-angle structure, and the ends of the two reflecting plates 220 are detachably fixed on the bottom plate 210 by the connecting member 300, and then the mounting member 400 is arranged at the intersection of the two reflecting plates 220, and an antenna is installed on the mounting member 400, so that the satellite flight direction measured in the field can be measured by The orientation of the reflection groove 221 is adjusted by the connecting member 300 so that the angular bisector of the reflection groove 221 and the satellite flight direction are kept as vertical as possible, with a difference of less than 20 degrees, thereby improving the reflection effect. The monitoring device is applied to the satellite-borne SAR technology to monitor the landslide movement state of the transmission line corridor. On the one hand, it can solve the problem that the reflection energy of low- and medium-resolution radar satellite signals is weak in the deformation and tilt monitoring application of the transmission tower in the prior art, resulting in the inability to effectively monitor. On the other hand, it can provide the geometric coordinates of the radar satellite image with cm-level accuracy. Finally, it can also realize the fusion of the mm-level accuracy observation results of Beidou deformation monitoring and InSAR deformation monitoring.

[0031] As a preferred embodiment, please refer to Figure 1 The bracket 100 includes two support arms 110, and the two support arms 110 are arranged at intervals. The two support arms 110 each include a support rod 111 and two clamps 112. The two clamps 112 are fixed on the support rod 111 and are used to be detachably fixed on the iron tower. The base plate 210 is detachably fixed on the two support rods 111. The clamps 112 are fixed to the angle steel of the first platform or the upper platform of the transmission tower via screws. A gasket is set at the connection between the two clamps 112, which can pass through the screw hole to prevent the connection part of the clamps 112 from deforming during tightening. A gasket is also set at the connection between the clamps 112 and the support rod 111, which passes through the screw hole to prevent the support rod 111 from deforming after the bolts are tightened.

[0032] As a preferred embodiment, please refer to Figure 2 and Figure 3 A plurality of rows of first mounting holes 211 are provided on the bottom plate 210, and each of the first mounting holes 211 in each row is radially spaced outward with the intersection of the two reflecting plates 220 as the axis. The angles between adjacent rows of the first mounting holes 211 can be adjusted according to needs, and the number of rows of the first mounting holes 211 can also be increased.

[0033] As a preferred embodiment, please refer to Figure 1The connecting member 300 includes two connecting plates 310, and the two connecting plates 310 are respectively arranged at the bottom of the corresponding reflecting plate 220 along the length direction of the reflecting plate 220. One side of the connecting plate 310 is fixedly connected to the reflecting plate 220, and the other side of the connecting plate 310 is provided with a row of second mounting holes 311, and each of the second mounting holes 311 in a row is spaced apart along the length direction of the connecting plate 310. The row of second mounting holes 311 on the connecting plate 310 can correspond to each row of the first mounting holes 211 in sequence, and can be detachably connected via screws. By changing the corresponding relationship between the two rows of the second mounting holes 311 and each row of the first mounting holes 211, the reflecting groove 221 can be adjusted within a certain angle range, which is convenient for adapting to the satellite flight direction, so that the angular bisector of the reflecting groove 221 and the satellite flight direction are kept as vertical as possible, and the difference is less than 20 degrees.

[0034] As a preferred embodiment, please refer to Figure 1 The connecting plate 310 has a first connecting surface 312 and a second connecting surface 313 which are fixedly connected and perpendicular to each other. The first connecting surface 312 is fixedly connected to the side wall of the connecting plate 310. A row of second mounting holes 311 is opened on the second connecting surface 313 so as to facilitate the communication between the second mounting holes 311 and the first mounting holes 211.

[0035] As a preferred embodiment, please refer to Figure 2 The corner reflector 200 also includes a first fixing member 230, which is detachably connected to the side walls of the two reflecting plates 220 to achieve detachable fixing of one side of the two reflecting plates 220, and enable the two reflecting plates 220 to form the reflecting groove 221 of a right-angle structure.

[0036] As a preferred embodiment, please refer to Figure 2 The first fixing member 230 has a first fixing surface 231 and a second fixing surface 232 which are fixedly connected and perpendicular to each other. The first fixing surface 231 is detachably fixed to the side wall of one of the reflecting plates 220 via screws, and the second fixing surface 232 is detachably fixed to the side wall of the other reflecting plate 220 via screws, so as to realize the detachable fixing of one side of the two reflecting plates 220, and enable the two reflecting plates 220 to form the reflecting groove 221 of a right-angle structure, and make the detachable connection of one side of the two reflecting plates 220 more convenient.

[0037] As a preferred embodiment, please refer to Figure 1The corner reflector 200 further includes a second fixing member 240 , which is detachably connected to the tops of the two reflecting plates 220 , thereby enhancing the connection strength of the two reflecting plates 220 .

[0038] As a preferred embodiment, please refer to Figure 1 The second fixing member 240 is a frame of an isosceles right triangle structure, and the two sides of the frame are detachably fixed to the top of the corresponding reflecting plate 220 via screws, thereby strengthening the connection strength of the two reflecting plates 220.

[0039] As a preferred embodiment, please refer to Figure 1 The mounting member 400 is a vertically arranged mounting pole for mounting an antenna, which is a Beidou / GNSS antenna. The geometric center and phase center of the corner reflector 200 are at the intersection of three vertical planes. There is only a horizontal deviation of 2 to 3 cm between the mounting pole and the intersection in the horizontal direction, which can be corrected to within the range by measuring means such as a vernier caliper. The vertical deviation between the mounting pole and the intersection in the vertical direction can be obtained by measuring the distance between the bottom of the mounting pole and the base plate 210.

[0040] In order to better understand the present invention, the following Figure 1 - Figure 5 The working principle of the technical solution of the utility model is described in detail:

[0041] When in use, the clamping plate 112 is fixed to the angle steel of the first platform or the upper platform of the transmission tower by screws, and then the bottom plate 210 is detachably fixed to the two support rods 111, and the bottom plate 210 is kept horizontally arranged, and then one side of the two reflecting plates 220 is detachably fixed to form the reflecting groove 221 of a right-angle structure, and the bottoms of the two reflecting plates 220 are detachably fixed to the bottom plate 210 by the connecting member 300, and then the mounting rod is set at the intersection of the two reflecting plates 220, and the antenna is installed on the mounting rod. According to the satellite flight direction measured in the field, by changing the two rows of the second mounting holes 311 The corresponding relationship with each row of the first mounting holes 211 can realize the adjustment of the reflection groove 221 within a certain angle range, which is convenient for adapting to the satellite flight direction, so that the angular bisector of the reflection groove 221 and the satellite flight direction are kept as vertical as possible, and the difference is less than 20 degrees, thereby improving the reflection effect. The monitoring device is applied to the satellite-borne SAR technology to monitor the landslide movement state of the transmission line corridor. On the one hand, it can solve the problem that the reflection energy of low- and medium-resolution radar satellite signals is weak in the deformation and tilt monitoring application of the transmission tower in the prior art, resulting in the inability to effectively monitor. On the other hand, it can provide geometric calibration of radar satellite images with cm-level accuracy, and finally realize the fusion of the mm-level accuracy observation results of Beidou deformation monitoring and InSAR deformation monitoring.

[0042] The utility model provides a transmission tower deformation monitoring device with the following beneficial effects:

[0043] (1) The monitoring device has a simple structure, is detachable, has a high degree of commonality of components, and is convenient for on-site assembly. The reflective groove 221 can be adjusted within a certain angle range and is suitable for ultra-high voltage transmission towers with angle steel structures.

[0044] (2) By changing the corresponding relationship between the two rows of the second mounting holes 311 and each row of the first mounting holes 211, the reflection groove 221 can be adjusted within a certain angle range, which is convenient for adapting to the satellite flight direction, so that the angle bisector of the reflection groove 221 and the satellite flight direction are kept as perpendicular as possible, with a difference of less than 20 degrees, thereby improving the reflection effect;

[0045] (3) The monitoring device is applied to the satellite-borne SAR technology to monitor the movement status of landslides in the transmission line corridor. On the one hand, it can solve the problem that the low- and medium-resolution radar satellite signals have weak reflection energy and cannot be effectively monitored in the existing transmission tower deformation and tilt monitoring applications. On the other hand, it can provide geometric calibration of radar satellite images with cm-level accuracy. Finally, it can also realize the fusion of the mm-level accuracy observation results of Beidou deformation monitoring and InSAR deformation monitoring.

[0046] The specific implementation methods of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. A transmission tower deformation monitoring device, characterized in that: include: A bracket, used for being detachably fixed on the iron tower; A corner reflector, comprising a bottom plate and two reflecting plates, wherein the bottom plate is horizontally arranged and detachably fixed on the bracket, and one side of the two reflecting plates is detachably fixed to form a reflecting groove of a right-angle structure; A connecting piece, used for detachably fixing the ends of the two reflecting plates to the bottom plate, and adjusting the orientation of the reflecting groove; The mounting piece is arranged at the junction of the two reflecting plates and is used for mounting the antenna thereon.

2. The transmission tower deformation monitoring device according to claim 1, characterized in that: The bracket includes two support arms, which are spaced apart from each other. The two support arms each include a support rod and two clamping plates. The two clamping plates are fixed on the support rod and can be detachably fixed on the iron tower. The base plate is detachably fixed on the two support rods.

3. The transmission tower deformation monitoring device according to claim 1, characterized in that: The bottom plate is provided with a plurality of rows of first mounting holes, and each of the first mounting holes in each row is radially spaced outwardly with the intersection of the two reflecting plates as the axis.

4. The transmission tower deformation monitoring device according to claim 3, characterized in that: The connecting member includes two connecting plates, and the two connecting plates are respectively arranged at the bottom of the corresponding reflecting plate along the length direction of the reflecting plate. One side of the connecting plate is fixedly connected to the reflecting plate, and the other side of the connecting plate is provided with a row of second mounting holes, and each of the second mounting holes in a row is spaced apart along the length direction of the connecting plate. A row of the second mounting holes on the connecting plate can correspond to each row of the first mounting holes in sequence, respectively, and can be detachably connected via screws.

5. The transmission tower deformation monitoring device according to claim 4, characterized in that: The connecting plate has a first connecting surface and a second connecting surface which are fixedly connected and perpendicular to each other. The first connecting surface is fixedly connected to the side wall of the connecting plate. A row of the second mounting holes is opened on the second connecting surface.

6. The transmission tower deformation monitoring device according to claim 1, characterized in that: The corner reflector further comprises a first fixing member, and the first fixing member is detachably connected to the side walls of the two reflecting plates.

7. The transmission tower deformation monitoring device according to claim 6, characterized in that: The first fixing member has a first fixing surface and a second fixing surface which are fixedly connected and perpendicular to each other. The first fixing surface is detachably fixed to the side wall of one of the reflecting plates via screws, and the second fixing surface is detachably fixed to the side wall of the other reflecting plate via screws.

8. The transmission tower deformation monitoring device according to claim 1, characterized in that: The corner reflector further comprises a second fixing member, and the second fixing member is detachably connected to the tops of the two reflecting plates.

9. The transmission tower deformation monitoring device according to claim 8, characterized in that: The second fixing member is a frame of an isosceles right triangle structure, and two sides of the frame are detachably fixed to the top of the corresponding reflecting plate via screws.

10. The transmission tower deformation monitoring device according to claim 1, characterized in that: The mounting member is a vertically arranged mounting rod.

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